Tool-holder.



A. LAWSON. TOOL HOLDER.

APPLICATION FILED JUNE 30, 1909.

Patented 111211121, 1911.

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AUGUST LAWSON, 033' JAMESTOWN, NEW YORK, .ASSIGNOR OF ONE-HALF TO NELS A. JOHNSON, F JAMESTOWN, NEW YORK.

TOOL-HOLDER.

To all whom it may concern:

Be it known that l, AUGUST LAWSON, a citizen of the United States, residing at Jamestown, in the county of Chautauqua, State ot N ew York, have invented new and v useful improvements in rlool-Holders, of

which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

The invention relates to holders for tools tor cutting metal by machinists; and the object ot' the invention is to provide a revoluble tool holder which will cut at any angle and which holds the tool in a peculiar manner whereby it is exceedingly firm not chattering or digging77 buttaking a steady ven cut; and the invention consists in the combination and arrangement of the parts, as shown in this description and drawings and pointed out in the claims.

In the drawings Figure 1 is a side elevation of the tool holder with the tool in place, the shank being broken away; and F ig. 2 is a verticalsectional view ot the same. Fig. 3 isaside elevation and Fig-4aplan view of the swivel mounted portion of the tool holder. Fig. 5 is a lplan view of the conical opening within which is swivelly mounted the portion of the tool holder shown in Figs. 3 and 4. Figs. 6 and 7 show both end and rear elevations of the resistance plate for the upper end of the cutting tool. Fig. 8 is a rear elevation of the complete tool holder showing the cutting tool turned at an angle.

Similar numerals refer to corresponding parts in the several views.

rlhe numeral 10 indicates the tool holder shank which at its lower end or head is formed with a conical shaped opening 11 which extends therethrough. The outer rim 12 or" the cone-shaped head of shank 10 is eX- tended sufficiently far to the rear of shank l0 to bring the front cutting face o't the tool 26 vertically under the pivot-al point of the apron of the planer. This also permits the tool 26 to be turned and held at any angle, as shown in Figs. 1 and 8. Around the inner side of the rear outer rim 12 of the coneshaped opening 11 a circular angular cut 13 is provided for a purpose hereinafter set forth,

The small end 14: of the cone-shaped opening 11 is made straight for some distance so Speccaton of Letters Patent.

Application filed June 30, 1969.

Patented Mar. 21, 1911.

Serial No. 505,181.

as to give a broad, strong bearing on the under side of part 14- and the diameter of the opening is somewhat larger than the cap bolt 15 which holds the parts together, in order to receive between said cap bolt and the inner side of the portion 14 the straight sleeve shaped end 39 of the swivel or revolubly mounted part 16 of the tool holder, thereby giving a strong, clean, straight bearing 111-.

The numeral 16 indicates the swivel mounted portion of the tool holder which is coneshaped on its outer side, as shown at 17 at one end, so as to lit loosely within the cone-shaped opening 11, a space 40 being allo-wed around the cone 17 for leeway so that the inner side of the cone-shaped opening 11 does not touch the cone 17, the bearing being only at the points 111 and 29. The cone 17 ends at its larger end, for about one-half its diameter, a short distance within the angular cut 13 in the cone-shaped opening 11, and the remaining lower half has the projecting angular tace 18 which projects within the angle 13 to keep it in place but does not bear against said angle 13. A second angular tace 19 is provided which does not bear against the face of the rim 12, being separated a short distance from said tace in order to allow the pressure of said face to come against the cutting tool 26, thereby clamping the cutting tool firmly in place, as shown in Fig. 1. Said lower half of the revolubly mounted portion 16 extends out in a tool holding portion 20 through which the opening 21 is vprovided for the cutting tool. The opening 21 for the cutting tool is -made sutliciently large and is so placed that the draw of the bolt 15 will invariably drawV the cutting tool 26 against the rim 12, as shown at 36. The upper face of the portion 20 is hollowed out as at 22'to admit the head 23 of bolt 15, to the hole 24, which hole extends through the cone-shaped portion 17 ot' part 16, which is enlarged at its rear end to receive the head 23, as shown in Fig. 2.

A resist-ance plate 25 is provided for holding the cutting tool 26 firmly in line on part 16. rlhe plate 25 is preferably triangular shape when viewed endwise and semicircular in form to fit within one-halt of the angular cut 13 and having a straight notch 27 down through Ythecenter of theV same to receive the tool 26V therethrough. The part 25'Yisloosely attachedrto rear face of the swivel portion 16 yby a screw in hole -28 sovthat the parts will not become. disengaged lwhen assembling the same. The opening 2l through rear projection 2O is cut vwith a rear bevelV 30,toward the upper end of the open-k ing so as toeinsure the tool 26 bearing iirmly near the lower edge 31 of the cut. The upper portion 32 ofthefcut2throughpart-25 is also cutaway slightlyV so as to give av lirm bearing forV the tool 26 at the point near Ethe front lower edge of the part 25.

VThe bolt 15 is held by a suitable nut 34 and steel washer 35 so that if the parts are assembled as shownin Figs. 1, 2, andY 8, the tool 26 Ymay be-quickly and readilyy released Y Vby unscrewing nutie and may be clamped lirmly in place by tighteningsaid nut. rPhe resistance plate 25V on the rear end of the lswivel bolt Vl5 forms'said bolt. into a two 'Y part bolt. Thedraw of the resistance V plate Y Vj againsty the cutting tool causes said resistance plate toV bind agaiust'thelhorizontal face of the angular cut 13, spreading the resistancel plate froin'* the remainder of the bolt sufficiently to accomplish this purpose.

The bearing points upon the tool 26 when the cutting strain is upon it will be at the points 31 and 33, and all the bearing4 points on'ltheftool holder will be the under side of bearing v'1in-the points 3l, 33, 37 and 38,` lt

-is thus apparent'that the strain upon the cutting tool 26 will bev` down the lower bevel Y, 40 from the point letto the point36 Vwith rear pressure at the point 31. The pressure uponv the point 33 ofresistance Vor clamping blockV 25 presses said block 25 dow-n upon theiace of rear part 2O at 38, thereby pressing-block 25Y against the angular face l13 at A' 37 The tool 'isthus rigidly heldin thetool holder in'such a manner' that Vit may spring en'dof the-tool holder permits ofthe placing slightly "withoutin anyvwise loosening this rigid"V holdpot the clamping parts on the tool, The'rearward projection of the lower in'tofjthe Vrnetal'since said rearward projection-brings the jtool intofline sothat it springsfon an ascending'arcinstead of a descending as would be the case of-a straight tool .on the `front of the latch and hence which the revolubly mounted .tool 26 Vmay beV y Y whenV it sosprings it'will cut less metal in stead,k of more. The"rearwardl projection also providesa rim with ak :tace`36 against rigidly clamped at any desired angle in a manner hereinbefore described. 'That is,the

cutting edgeof the tool *mayV project in any desired direction. froml said rim .and be clamped firmly in said desired position. It is also obvious that my tool holder is `adapted for use upon any of the common forms of planer latches, the length of the rearward projection being varied for `the diiferent uses, and the construction permits of the tool holder being'made any desired size so `as to stand the heaviest forms of work and firmly hold the cutting tool to its work, giving it a smooth straight cut.

- l claim as new A tool holder comprising in combination, a Yshank having a `transverse conical bearing, a member adapted to receive a tool vertically therein slidably jmounted in said bearing, means for binding said tool between said bearing and said receiving member, and a member cooperating with said bearing to bind said tool inaddition to said bearing and receiving member.-

2. A toolholder comprising in combination, a shank having a transverse conical bearing,`a member adapted to receive a tool vertically therein slidably mounted in said bearing, means for binding said tool between said bearing and said receiving member, and means cooperating with the last mentioned elements to support said tool at three points. Y 3. A tool-holder comprising a shank having a projection beyond its rear side near its lower end, said lower end of said shank having a hole therethrough within said projection, said projection having an angular circumferential shoulder around the mouth of said hole adjacent itsrear face, and' means mounted in said hole yto rigidly clamp and hold the cutting tool at different angles against the side o said circumferential shoulder and the rear side of said projection.

4. A tool holdercomprisinga shank having a' rim projecting beyond its rear side near its lower end, said lower end of said shank having a hole therethrough from front tov rear within said projecting rim, a two `part bolt revolublyl mounted in said hole, and means for spreading the parts of said'two part bolt tohold against the inner side of said hole through said shank and clamp the cutting tool against the rear side of said projecting rim.

5. A tool holder comprising av shank having an opening from front to rear through its lower end, am'ember'revolubly mounted in said opening, a bolt to hold said member, said revolubly mounted 'member having an opening therethrough, crosswise of and adjacent the rear side ofsaidl shank for the cutting tool, and aclamp'ing piece on said revolubly mounted Vpart to aid in holding said tOOl l 6. A tool holder'comprising a shank having a head with a rearward projection therefrom', a cone-shaped opening` through said head, a'cone-shaped portion swivel mounted in said cone-shaped opening, said swivel mounted portion having a crosswise opening therethrough for the cutting tool, and a clamping plate on said swivel mounted portion to aid in the rigid holding of said tool. 7. A tool holder comprising a shank, a rearward projection on the lower end of said shank having an opening therethrough, a portion swivel mounted in said opening, said swivel mounted portion having a crosswise opening therein for the cutting tool, and a resistance plate for the cutting tool on said swivel mounted portion, the cutting tool clamped and released by the draw of said swivel mounted portion and said resistance plate. e

8. A tool holder comprising a shank having a rearward projection on its lower end, said lower end having a cone-shaped opening crosswise therethrough, a cone-shaped part to fit said cone-shaped opening and revolubly mounted therein, a rearward eXtension on said cone-shaped part having an opening therethrough for holding the cutting tool crosswise of the rear Jface of said rearward extension, a clamping plate on said rearward extension of said cone-shaped part having a bearing on said rearward projection of said shank, and a bolt through said coneeshaped part to clamp the cutting tool against said rearward projection of the shank and said clamping plate, substantially as and for the purpose specified.

9. A tool holder comprising a shank haw ing a rearward-ly projecting cone-shaped head, said cone-shaped head having a coneshaped opening therethrough with an angular circumferential cut adjacent the rim around its larger end, a cone-shaped portion to revolubly t within said cone-shaped opening and having a hole therethrough, a bolt in said hole to draw the parts together, a tool holding extension on said cone-shaped port-ion having a crosswise opening therethrough for the cutting tool adjacent said rearward projecting rim of the shank head, a semicircular clamping plate to bear against the angular' circumferential cut ad jacent said rim on one side and to bear upon said tool holding extension on another side, said semi-circular plate having a groove for the cutting tool in line with the opening in said extension, substantially as shown and described.

In testimonywhereof I have signed my name to this specification in the presence of two subscribing witnesses.

AUGUST LAVSON.

Vitnesses:

A. W. KETTLE, I. A. ELLswoRTI-L Copies of this patent may be obtained for" five cents each, by addressing the Commissioner of Patents, Washingtona D. C. 

